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DURAG Volume Flow Measurement Systems

About DURAG Volume Flow Measurement Systems

DURAG volume flow measurement systems provide accurate, contactless monitoring of gas flow for emission control and process optimization, even in humid, high-temperature industrial environments.

Technical Specifications

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Description

DURAG Volume Flow Measurement Systems

DURAG GROUP offers a range of volume flow measurement systems designed for continuous, contactless monitoring of gas flow in industrial applications. These systems are essential for both emission monitoring and process control, providing accurate data even under challenging conditions such as humid, aggressive, or high-temperature gas streams.

Purpose and Importance

In industrial plants, measuring the volume flow of flue gases is critical not only for regulatory compliance but also for optimizing operational efficiency. Volume flow data is used to calculate mass emissions when combined with pollutant concentration values, making it a key parameter in environmental reporting and control strategies.

Technology and Functionality

DURAG systems typically use the ultrasonic transit time difference method, which enables in-situ, contactless measurement of gas velocity across the full duct diameter. This velocity data is then used to calculate the volume flow. Systems can be configured to measure both operational and standardized volume flow, with optional sensors for temperature and pressure compensation.

System Components

  • Ultrasonic transducers (corrosion-resistant)
  • Power supply and control units
  • Optional operating units with display
  • Interfaces for analog and digital outputs, Modbus, USB
  • Weather protection for outdoor installations

Key Benefits

  • Reliable performance in dry, humid, and aggressive gas conditions
  • Certified for official emission monitoring (e.g., QAL1, EN 15267, US EPA)
  • Low maintenance and long service life
  • Remote access via web interface for diagnostics and data retrieval
  • Flexible installation for ducts ranging from 0.5 to 14 meters in diameter

Applications

  • Continuous emission monitoring in power plants, waste incinerators, and chemical facilities
  • Process optimization through real-time flow data
  • Environmental compliance reporting
  • Integration with CEMS and other monitoring systems

Whether for small ducts or large-scale industrial stacks, DURAG volume flow measurement systems deliver precise, reliable data to support safe, efficient, and compliant operations.

 

D-FL 100

Volume flow measuring system

D-FL 100

For continuous volume flow measurement in dry gases. Reliable, even under extreme operating conditions.

Functionality: Differential pressure principle

  • Continuous measurement of velocity and volume flow
  • Double-sided installation for measurement over the entire duct diameter or cost-saving single-sided installation
  • Robust and resistant probe material for use in aggressive gases or at high temperatures (optional)
  • Probe individually adapted to the application
  • Automatic back purging unit (optional)
  • Automatic internal self-test

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D-FL 220

Volume flow measuring system

D-FL 220 measuring devices side by side

For continuous, contactless volume flow measurement in dry and humid gases. Reliable, even under demanding operating conditions.

Functionality: Ultrasonic transit time difference method

  • Continuous measurement of velocity and volume flow
  • Contactless measurement
  • Corrosion-resistant ultrasonic transducers
  • Measurement over the entire duct diameter
  • Automatic check functions

More information

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